Патент USA US2116000код для вставки
May 3, 1938. 2,116,000 . R. o.ÈPETERsoN COATING FOR .GASKETS AND THE LIKE ' lFiled March 8, 1955l ‘I FIG.' j . Ffa: J l:1&4 l Powdered Me?a/ Hafer/fc A Tram/sy 3,116,000 COATING FÜR GASKlETS AND THE ‘LIKE _ - Rubeno. Petersen, Glen Ellyn, lll., assigner to Victor Manufacturing & Gasket Company, Chl cago, Ill., a. corporation or Iliinois `Application March li, 1935, Serial No. 10,050 This invention relates to an improved coating for gaskets and the like, and has for one of its principal objects the provision of a material which shall render the gasket impervious to wa 5 ter, oil, gasoline, alcohol and other chemicals, and which shall further render the same prooi against electrolytic action. acts as an insulator. \ The 'coating also y ' Anotherimportant object of the invention is to provide a gasket coating which is capable of ` being applied in relatively small amounts and ot a minimum thickness in that it will not penetrate the material oi the gasket itself, such as asbestos iibers or the like, but which will, at the same time, aiîord adequate protection against pene tration of the saine by other materials. A still further object of the invention is to produce a coating for gaskets which can be ap plied by means of dipping, spraying, or _which 20 can even be printed thereon by means of print . ing rollers or the'like, and which will be quite flexible and resilient, so that it will not chip or Figure 3 shows an asbestos gasket with metal layers on its face and with improved processed hydrocarbon coating of this invention applied to ' theouter face of the metal. Figure 4 illustrates an asbestos gasket with 5 an inner metal reinforcement and with the coat ing 4olf this invention applied directly to the as bestos and penetrating to some extent the sur face thereof. - Figure 5 shows a gasket somewhat similar to that illustrated in Figure ‘l with an additional coating applied to and over the first coating. Figure 6 illustrates a plain asbestos gasket with a coating such as that of Figure 4 and with a further coating of powdered metal on'the outer surface. ' Figure 7 illustrates an asbestos gasket prelim inarily covered with paper or the like and with the improved coating of this invention applied to the paper. « ° _ Figure 8 illustrates an asbestos gasket, one face 2o scale off the gasket either the asbestos or metal _ «of which is coated with a synthetic resin, after » portions thereof, and which, furthermore, has 25 remarkable adhesive properties. A still further important object of the inven tion is tol provide a gasket coating which will withstand temperatures of 1000*’ F. and which ` will, at all times, allow the interior of the gasket 30 material to retain its resilient qualities, while, at the same time, protecting the exterior from tackiness or liability to adhere or stick to the cylinder head or block. Another object is the provision oiY a coating 35 which canv be used in conjunction with some foundation material, as, for example, la thin sheet of paper and which can then be applied to a gasket for protective purposes so as to avoid undesirable scumng or loosening of the asbestos fibers while handling, and which will, at the same time, retain all its fire, water and oil proofing which the improved coating of this invention is applied 'to the resin. Figure 9 shows a further type of asbestos gas 25 ket, the surfaces/of which are ñrst covered with the improved coating of this invention, after which graphite is applied. Obviously, the di mensions of the coatings are somewhat exagger ated in the drawing in order to make for a better 30 understanding of the ñgures. ` g The improved coating oi’ this invention is com posed of a processed hydro~carbon known as elaterite and is prepared with a coal tar or a naphtha solvent in equal amounts with the 35 elaterite in an autoclave under pressure and gradually heating up to a temperature not more than i300o F. which digests the elaterite. This digested material can then be used as a coating for a gasket or for any other purpose 40 wherein a coating impervious to water, oil, al qualities. . cohol and similar materials is desired and where Other and further important objects of the the coating is adapted to resist temperatures up invention will be apparent from the disclosures to 1000‘l F. f , in the accompanying drawing and following The material is su?ciently resilient so that it speciñcation. - 'I'he invention, in a preferred form, is herein after more fully described. In the drawing: y Figure 1 is a top plan view of a representa tive gasket showing the improved coating of this invention applied thereto. Figure 2 is a cross section oi a gasket of metal 5 Ul with one of the improved coatings of this inven tion thereon and applied to both faces thereof. 45 will not chip or scale oit a gasket under all nor mal operating conditions.' lï‘urther, it will adhere' to either metal, asbestos, or other gasket mate rials with remarkable tenacity. `The insulating qualities of this coating are 60 such that- all electrolytic action will be positively prevented between different metals even under the most severe operating conditions encountered in the use of' internal combustion engines. In this manner, undesirable corrosive action is 55 2,116,000 2. porous as possible, two coats of elaterite should be used or a coat of elaterite over some other priming coat, as, for example, a synthetic resin or lacquer. eliminated, and the use of gaskets made entirely of metal is rendered possible. Thefcoating can be applied by> dipping, spray ing or‘ by simply running the gasket or other material to be coated through printing rollers Gaskets composed entirely of metal maybe coated with this material to render .them im pervious to the action of various fluids and to or the like by means of which this elaterite , coating can be applied simply and economically and without any` waste. It has been found that a coating of not more than one one-thousandth of an inch is sufficient for all practical purposes. also afford a more resilient structure. Such an all-metal gasket cannot be absolutely water If desired, the coating need not be applied directlyv to the surface of a gasket, but vmay be preliminarily sprayed, dipped or printed upon a seaied without a coating of a type such as this. It has been found that two or more coats pro duce a very satisfactory sealing eifect together with additionalresilience. Gaskets composed of combinations of packing material such as asbes sheet >of some flexible material such as paper or- tos and metal may also be coated with this ma foil, which' prepared sheet. can then be mounted 16 on the vgaslret,'talring advantage of the normal ‘ terial to considerable advantage. »The asbestos packing vmay be saturated with adhesiveness or tackiness of the digested elaterite so as to form a good bond between the two the processed elaterite, either alone or mixed a vegetable oil. , surfaces. AIt has been found by experiment that with In the case of gaskets which have an inner 20 exposure of. such a material .to heat which will 20 carbonize Athe~paper or other foundation mate ` metal reinforcing structure, the elaterite may be rial -will not affect the digested elaterite, thereby causing a satisfactory coating to remain.- Obvi ously, lthiscoating may be used for materials other than gaskets whenever results asdescribed above are desired. f Either before or -after the digested elaterite thinned before application in order lto obtain considerable penetration, and it has been found that by its use, the fibers of >asbestos will not have the undesirable tendency to pull away from the metal insert. ' I am aware that many changes may be made has been applied as a coating, the same may be in the composition and numerous other ingre colored with a pigment, if desired, so that the ' dients may be added to the digested elaterite to form coatings suitable for various purposes with out departing from the principles of this inven tion, and I, therefore, do not purpose limiting the readily identified as the . more attractive or more product of a certain manufacturer. - Further, the patent granted hereon otherwise than as neces 30 resultant gasket or other coated device may be ' produced in colors which might render .the same by'the prior art.4 digested elaterite maybe preliminarily applied, sitated I claim as my invention: 35 and the surface, while still tacky, be dusted or otherwise covered with another material, either colored or otherwise,lsuch as, for example, ground vermlculite. a powdered metal or any other >substance which may be. found desirable or adaptable. Y ’ „ . .Up to- 600° F. there is relatively no change in the mechanical characteristics of the coating material, nor is _there any change _in its chemical characteristics. Over 600° F. the material be 45 comes more brittle but will notgdisintegrate or be moved out of its original position until tem peratures of over 1000° F. are attained. There is a polymerizing actionl which gradually progresses as lthe temperature rises, but ordinarily it may 50 be said that the higher the temperature becomes, the more resistant is the material to any chemical action. ; e Y The elaterite itself is used as nearly as possible in its original state, but its properties can be 55 taken advantage of- only inv its digested form. _ The material can be applied in one or more coats,>but one coat will actually serve-as both a priming coat and a second coat. However, in order to obtain a coating which is vas nearly non 35 1. A gasket comprising a packing material and a unitary coating of foil and digested elaterite thereover. . - 2. A gasket comprising a ‘packing material and a combination unitary coating of paper and di 40 gested elaterite applied to the surfaces thereof. 3. A covering material for gaskets, comprising a foundation of ñbrous material and digested elaterite applied thereto.' and a further coating 45 of metallic dust over the digested elaterite. 4. A covering material for gaskets, comprising a foundation of y_fibrous material and digested elaterite applied thereto, and a further coating of ground vermiculite over> the digested elaterite. 5. A gasket, comprising a sheet of packing ma 50 terial, and a coating of digested elaterite on .the surfaces> thereof, _together with a >furtherco‘ating of graphite over the whole.y 6. A gasket, comprising a sheet of asbestos,Í andl a covering therefor, said covering comprising a 55 relatively thin sheet of fibrous material coated with digested elaterite. f _ RUBEN O. PETERSON.